222685380 has 144 divisors (see below), whose sum is σ = 727547184. Its totient is φ = 54927360.

The previous prime is 222685373. The next prime is 222685381. The reversal of 222685380 is 83586222.

It can be written as a sum of positive squares in 8 ways, for example, as 10458756 + 212226624 = 3234^2 + 14568^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (222685381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 186064 + ... + 187256.

It is an arithmetic number, because the mean of its divisors is an integer number (5052411).

Almost surely, 2^222685380 is an apocalyptic number.

222685380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222685380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (363773592).

222685380 is an abundant number, since it is smaller than the sum of its proper divisors (504861804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

222685380 is a wasteful number, since it uses less digits than its factorization.

222685380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286 (or 1281 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 222685380 is about 14922.6465481161. The cubic root of 222685380 is about 606.1273790334.

The spelling of 222685380 in words is "two hundred twenty-two million, six hundred eighty-five thousand, three hundred eighty".